Summary
I'm using react-native-map and trying to use animateCamera and animateMarkerToCoordinate both at the same time but couldn't animate the animateCamera at all.
The working part so far
The "red circle" in the gif I've shared below, should be moving from one location to another location with animation. I've taken advantage of this comment to be able to move marker with animation turning the code into functional component and it really worked. Moving marker gif
My aim
I want the camera also move besides marker, so that the red circle should always be felt like it is centered in the phone screen. All this should occur when I press "animate" button below.
I've tried to do the same thing to the mapview what I've done to marker.
I've created a state
const [mapRef, setMapRef] = useState(null);
and supplied connection between <MapView> and mapRef state using the below line beginning with ref
return (
<View style={...}>
<MapView
ref= {mapRef => {setMapRef(mapRef);}}
initialRegion = {
...
}
...
/>
So when the button is pressed it goes inside this function and try to work animateCamera function
function animateMarkerAndCamera() {
let newCoordinate = {
latitude: 32.601,
longitude: 44.0172,
latitudeDelta: 0.012,
longitudeDelta: 0.012,
};
let Camera = {
...
}
if (myMarker) {
myMarker.animateMarkerToCoordinate(newCoordinate, 4000);
mapRef.animateCamera({Camera}, 4000)
}
}
By the way Camera adjusted like it is mentioned in docs
let Camera = {
center: {
latitude: newCoordinate.latitude,
longitude: newCoordinate.longitude,
},
pitch: 2,
heading: 20,
zoom: 40
}
So I'm expecting for it to animate just like it did for marker's animation, but not working.
Please tell me my fault.
Full code...
import React, {useState} from 'react'
import { View, Text, TouchableOpacity, StyleSheet } from 'react-native'
import MapView, { AnimatedRegion, MarkerAnimated } from 'react-native-maps';
const PlayScreen = (props) => {
const [myMarker, setMyMarker] = useState(null);
const [mapRef, setMapRef] = useState(null);
const [coordinate, setCoordinate] = useState(new AnimatedRegion({
latitude: 32.5983,
longitude: 44.0175,
latitudeDelta: 0.012,
longitudeDelta:0.012,
}));
function animateMarkerAndCamera() {
let newCoordinate = {
latitude: 32.601,
longitude: 44.0172,
latitudeDelta: 0.012,
longitudeDelta: 0.012,
};
if(myMarker){
myMarker.animateMarkerToCoordinate(newCoordinate,4000);
mapRef.animateCamera(newCoordinate, 4000);
}
}
return (
<View style={styles.container}>
<MapView
ref= {mapRef => {setMapRef(mapRef);}}
style={styles.map}
initialRegion={{
latitude: 32.5983,
longitude: 44.0175,
latitudeDelta: 0.012,
longitudeDelta: 0.012,
}}
>
<MarkerAnimated
ref={marker => {
setMyMarker(marker);
}}
image={require('../../../Assets/Images/curlingStone.png')}
coordinate={coordinate}
/>
</MapView>
<View style={styles.buttonContainer}>
<TouchableOpacity
onPress={() => animateMarkerAndCamera()}
style={[styles.bubble, styles.button]}
>
<Text>Animate</Text>
</TouchableOpacity>
</View>
</View>
);
}
const styles = StyleSheet.create({
container: {
...StyleSheet.absoluteFillObject,
justifyContent: 'flex-end',
alignItems: 'center',
},
map: {
...StyleSheet.absoluteFillObject,
},
bubble: {
flex: 1,
backgroundColor: 'rgba(255,255,255,0.7)',
paddingHorizontal: 18,
paddingVertical: 12,
borderRadius: 20,
},
latlng: {
width: 200,
alignItems: 'stretch',
},
button: {
width: 80,
paddingHorizontal: 12,
alignItems: 'center',
marginHorizontal: 10,
},
buttonContainer: {
flexDirection: 'row',
marginVertical: 20,
backgroundColor: 'transparent',
},
});
export default PlayScreen
CodePudding user response：
So, as I've explained before, I was trying to use animateCamera and animateMarkerToCoordinate together so that it could feel like my marker, the red circle, is always at the center and only the coordinates seem to be changing.
After a little research, I've found this and made mine similar to this code. Now I obtained what I wanted to achieve.Gif is here
Changes I've made were written as comments
The code is below
import {useState, useRef} from 'react'
import ... //same as before
const PlayScreen = (props) => {
const markerLatitude=32.5983
const markerLongitude=44.0175
//changed from useState to useRef
const mapRef = useRef (null);
const [myMarker, setMyMarker] = useState(null);
const [coordinate, setCoordinate] = useState(new AnimatedRegion({
latitude: markerLatitude,
longitude: markerLongitude,
latitudeDelta: 0.012,
longitudeDelta: 0.012,
}));
function animateMarkerAndCamera() {
let newCoordinate = {
latitude: 32.601,
longitude: 44.0172,
latitudeDelta: 0.012,
longitudeDelta: 0.012,
};
//camera will position itself to these coordinates.
const newCamera= {
center: {
latitude: 32.601,
longitude: 44.0172,
},
pitch: 0,
heading: 0,
//zoom: 17 --Use it when required
}
if (myMarker) {
myMarker.animateMarkerToCoordinate(newCoordinate, 4000);
//camera type, `newCamera`, used inside animateCamera
mapRef.current.animateCamera(newCamera, {duration: 4000})
}
}
return (
<View style={styles.container}>
<MapView
ref={ mapRef } //There is also change here
style={styles.map}
initialRegion={{
latitude: 32.5983,
longitude: 44.0175,
latitudeDelta: 0.012,
longitudeDelta: 0.012,
}}
//These are newly added
pitchEnabled ={false}
zoomEnabled ={false}
>
<MarkerAnimated
ref={marker => {
setMyMarker(marker);
}}
{/*any kind of image can be replaced here */}
image={require('../../../Assets/Images/curlingStone.png')}
coordinate={coordinate}
/>
</MapView>
<View style={styles.buttonContainer}>
<TouchableOpacity
onPress={() => animateMarkerAndCamera()}
style={[styles.bubble, styles.button]}
>
<Text>Animate</Text>
</TouchableOpacity>
</View>
</View>
);
}
export default PlayScreen
const styles = StyleSheet.create({ ... //same as before